Effect of Nb on oxidation behavior of NiTiNb alloys

The oxidation behavior of NiTi and NiTiNb alloys containing different amounts of Nb （7%, 9%, mole fraction） were studied at 800℃ in air. It is found that the oxidation resistance of NiTi alloy can be effectively increased by the Nb addition. Under the same oxidation condition, the mass gain of NiTi...

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Bibliographic Details
Published inTransactions of Nonferrous Metals Society of China Vol. 16; no. A02; pp. 31 - 36
Main Author 徐舰 赵新青 宫声凯
Format Journal Article
LanguageEnglish
Published School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China 01.09.2006
Subjects
NiTiNb合金
动力学
氧化行为
高温氧化
kinetics
NiTi
NiTiNb
high-temperature oxidation
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ISSN1003-6326

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Summary:The oxidation behavior of NiTi and NiTiNb alloys containing different amounts of Nb （7%, 9%, mole fraction） were studied at 800℃ in air. It is found that the oxidation resistance of NiTi alloy can be effectively increased by the Nb addition. Under the same oxidation condition, the mass gain of NiTi is about 7 mg/cm^2, while the inass gains are only 3 mg/cm^2 for Ni47Ti44Nb9 alloy and 2.4 mg/cm^2 for Ni52Ti41NbT. Moreover the oxidation resistance of single phase NiTiNb alloy is better than that of the dual-phase alloy with large amount of Nb precipitates. On the basis of thermodynamics and kinetics of oxidation, the effect of Nb alloying element on the oxidation behavior of NiTi-based alloys was discussed.
Bibliography:TG146.15
43-1239/TG
NiTi
NiTi; NiTiNb; high-temperature oxidation; kinetics
kinetics
NiTiNb
high-temperature oxidation
TG146.23
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content type line 23
ISSN:1003-6326